Zonster Saltwater Hydrometer Thermometer for Aquarium, High Accuracy, Analog, 19.5cm

Description

If water level below the green indicator means more fresh water is required
It is recommended that the proportion of seawater in the seafood pond is between 1.020-1.023, which is within the safety line
Placed in any corner of the aquarium, suspended design, automatic temperature/specific gravity test
If water level above the green indicator means more salt water is required
Green indicators are ideal range of water temperature and specific gravity for most salt water / marine . Test range 0-40℃ 1.000-1.060